<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>demo</title>
    <script type="text/javascript" src="../vue.js"></script>
</head>

<body>
    <div id="app">
        <h1>{{b}}</h1>
    </div>
</body>
<script type="text/javascript">
    Vue.config.productionTip = false
    const vm = new Vue({
        el: "#app",
        data() {
            return{
                b: 'vue hello'

                
            }
        }
    })

    // 在vue挂载之后,可以通过vm.$el获取到模板容器(真实dom)
    console.log(vm.$el);
</script>

</html>